What specs do you need?
Here are the system requirements for TradeStation and MultiCharts:
Based on that I'd shoot for at least:
- Quad core (3 GHz to 3.5 GHz)
- 8 GB to 16 GB of RAM
- SSD
What VM should you choose?
Looking at the system requirements, I would really entertain the idea of a compute optimized VM like the Fsv2 series as the CPU is likely going to be pretty important. Between the two options you listed it sounds like you'll get more out of the Standard_D4s_v3 although I worry about the CPU.
https://learn.microsoft.com/en-us/azure/virtual-machines/sizes
What about Azure Hybrid Benefit?
The Azure Hybrid Benefit is designed for enterprise customers:
https://azure.microsoft.com/en-us/pricing/hybrid-benefit/faq/
Which licenses are eligible for Azure Hybrid Benefit?
SQL Server and Windows Server licenses with active Software Assurance or qualifying subscription licenses. These include:Windows Server Datacenter edition with Software Assurance.
Windows Server Standard edition with Software Assurance.
SQL Server Enterprise Edition core licenses with Software Assurance or qualifying subscription licenses.
SQL Server Standard Edition core licenses with Software Assurance or qualifying subscription licenses.
If that sounds like something that might be of interest to you, I recommend reaching out to sales as they'll be able to guide you through all of the available options:
https://azure.microsoft.com/en-us/overview/contact-azure-sales/
Additional reading: